A basic hydrostatic principle is evident in this photo of a water tower in New York City - notice the variable spacing of the circumferential hoops (more closely spaced toward the bottom of the tank).
Found at Kottke.
The subtle science of an urban water tower
A basic hydrostatic principle is evident in this photo of a water tower in New York City - notice the variable spacing of the circumferential hoops (more closely spaced toward the bottom of the tank).
Found at Kottke.
